A passive optical network (PON) is a system that brings optical fiber cabling and signals all or most of the way to the end user. Depending on where the PON terminates, the system can be described as fiber-to-the-curb (FTTC), fiber-to-the-building (FTTB), or fiber-to-the-home (FTTH).

Downstream signal coming from the central office is broadcast to each customer premises sharing a fiber. Encryption is used to prevent eavesdropping. Upstream signals are combined using a multiple-access protocol, usually time division multiple access (TDMA).

A PON consists of an optical line terminal (OLT) at the service provider’s central office (hub) and a number of optical network units (ONUs) orOptical Network Terminals (ONTs), near end users.

Since its promotion in 2003, FTTH has gone through 14 years. Since its launch in 2013, “Broadband China” has experienced another four years. FTTH has evolved from the dream of optical communications people to reality and has become a place where people work, study and live Indispensable infrastructure.

FTTH is an abbreviation for fiber optic directly to the home, abbreviated as FTTH in Chinese. Specifically, FTTH refers to installing an ONU at a home user or an enterprise user, and is an optical access network application type closest to a user except an FTTD (fiber to the desktop) in the optical access family. The significant technical feature of FTTH is that it not only provides more bandwidth, but also enhances the transparency of the network to data formats, rates, wavelengths and protocols, relaxes the requirements for environmental conditions and power supply, and simplifies maintenance and installation. When it comes to FTTH, you first have to talk about fiber access. Optical fiber access refers to the central office and users entirely between the optical fiber as a transmission medium. Optical access can be divided into active optical access and passive optical access. The main technology of optical subscriber network is optical transmission technology. At present, the multiplexing technology of optical fiber transmission develops quite fast, and most of them are in practical use. According to the depth of fiber users, can be divided into FTTC, FTTZ, FTTO, FTTF, FTTH and so on.

ODN is an FTTH optical fiber network based on PON equipment, which provides optical transmission channel between OLT and ONU.From the perspective of function,ODN can be divided into four parts: feeder cable subsystem, distribution cable subsystem, inbound cable subsystem and fiber terminal subsystem.

ONU consists of active Optical Network Unit and passive Optical Network Unit.It has two functions: selective reception of the broadcast sent by OLT, and receiving response to OLT if the data is needed;The Ethernet data that the user needs to send is collected and cached, and the cached data is sent to the OLT side according to the assigned send window.

Yes.Our products have these functions.In particular, most of our ONU products also have WiFi capabilities.

MAC Address is the media access control address, also known as the LAN Address, Ethernet Address, or Physical Address.It is an address used to confirm the location of a network device.In the OSI model, the third network layer is responsible for IP address, while the second data link layer is responsible for MAC address. MAC address is used to uniquely identify a network card in the network. If a device has one or more network cards, each network card needs and will have a unique MAC address.

FTTO means Fiber To The Office.FTTO mode of operation, the operators pull cable relative concentration areas, to the customer after the right branch connection to the user’s computer room or equipment, for a user large commercial office buildings, such as CBD EPON OLT equipment can directly be placed into the building room, after vertical cable wiring, again through the appropriate branch, connect the optical fiber to the end user.

A virtual local area network (VLAN) is a group of logical devices and users that are not limited by their physical location， but can be organized according to functional， departments and applications, and communicate with each other as if they were in the same network segment.VLAN is a relatively new technology that works in layer 2 and layer 3 of the OSI reference model. A VLAN is a broadcast domain, and communication between VLAN is accomplished through layer 3 routers.Compared with the traditional LAN technology, VLAN technology is more flexible, it has the following advantages: network equipment to move, add and modify the management overhead reduced, can control broadcast activities, can improve network security.